LIGAMENTS OF OVIDUCT OF DOMESTIC FOWL. II 



of this preparation. The dorsal Hgament Hes toward the top 

 and the ventral ligament toward the bottom of the photograph. 

 The left margin is the anterior end of this piece of the oviduct 

 and ligaments. The heavy muscular mass which shows at the 

 bottom of the photograph is the caudal end of the free margin 

 of the ventral ligament. From this the fiber bundles pass out 

 into the ligament and separate into smaller bundles as the ovi- 

 duct is approached. The cut ends of some of the fiber bundles 

 appear, rather indistinctly, where the lateral wall of the duct 

 was cut away. Some of the bundles can be traced onto the 

 medial wall of the oviduct where they lie below the circular 

 fibers which also appear in the photograph. In the dorsal liga- 

 ment most of the muscle fibers lie below the blood vessels but 

 some of them accompany these vessels. At the margin of the 

 oviduct many of these fibers can be seen passing beneath the 

 layer of circular fibers. 



Figure 9 shows the medial aspect of the same preparation 

 figured in Figure 8. The dorsal ligament lies toward the top 

 and the ventral toward the bottom as before. In Figure 9, 

 however, the anterior end of the preparation lies to the right. 

 The continuation of the muscle bundles from the ligaments to 

 the duct show more clearly than in Figure 8 since they here 

 lie above the intrinsic circular fibers of the duct. The fiber 

 bundles in the dorsal ligament show above the blood vessels. 

 The origins of these bundles are seen near the dorsal margin 

 of the ligament. The origin of a number of the bundles shown 

 in this preparation are crowded together near the center of 

 the part of the dorsal margin which is shown here. 



Sections of a young oviduct with the ligaments attached show 

 these bundles of muscle fibers arranged in layers near the peri- 

 toneal surfaces of the ligaments. These layers of muscle bun- 

 dles are continuous with the outer muscular layer of the wall 

 of the oviduct. The ventral ligament, as has been noted, has 

 a heavy mass of muscle bundles near its free margin. This 

 mass of muscle separates into two distinct layers, one near the 

 peritoneum of each side of the ligament. At the ventral mar- 

 gin of the duct these muscle layers continue around it. each 

 preserving the same relation to the peritoneum which it has in 

 the ligament In chicks up to 4 months old, at least, the 

 two layers of muscles which pass to either side of the duct are 



